659998122 has 32 divisors (see below), whose sum is σ = 1557233664. Its totient is φ = 182487600.

The previous prime is 659998109. The next prime is 659998127. The reversal of 659998122 is 221899956.

It is not an unprimeable number, because it can be changed into a prime (659998127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252154 + ... + 254757.

It is an arithmetic number, because the mean of its divisors is an integer number (48663552).

Almost surely, 2^659998122 is an apocalyptic number.

659998122 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

659998122 is an abundant number, since it is smaller than the sum of its proper divisors (897235542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

659998122 is a wasteful number, since it uses less digits than its factorization.

659998122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506954.

The product of its digits is 699840, while the sum is 51.

The square root of 659998122 is about 25690.4286067788. The cubic root of 659998122 is about 870.6579433099.

The spelling of 659998122 in words is "six hundred fifty-nine million, nine hundred ninety-eight thousand, one hundred twenty-two".